WO2015101181A1 - 一种抑制骨传导扬声器漏音的方法及骨传导扬声器 - Google Patents

一种抑制骨传导扬声器漏音的方法及骨传导扬声器 Download PDF

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Publication number
WO2015101181A1
WO2015101181A1 PCT/CN2014/094065 CN2014094065W WO2015101181A1 WO 2015101181 A1 WO2015101181 A1 WO 2015101181A1 CN 2014094065 W CN2014094065 W CN 2014094065W WO 2015101181 A1 WO2015101181 A1 WO 2015101181A1
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WIPO (PCT)
Prior art keywords
sound
bone conduction
outer casing
leakage
conduction speaker
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Application number
PCT/CN2014/094065
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English (en)
French (fr)
Chinese (zh)
Inventor
齐心
廖风云
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深圳市韶音科技有限公司
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Application filed by 深圳市韶音科技有限公司 filed Critical 深圳市韶音科技有限公司
Priority to KR1020167017110A priority Critical patent/KR101900661B1/ko
Priority to BR112016015742-7A priority patent/BR112016015742B1/pt
Priority to DK14877111T priority patent/DK3094103T3/da
Priority to JP2016545828A priority patent/JP6282749B2/ja
Priority to US15/109,831 priority patent/US9729978B2/en
Priority to EP14877111.6A priority patent/EP3094103B1/en
Priority to KR1020227010046A priority patent/KR102528291B1/ko
Priority to ES14877111T priority patent/ES2753428T3/es
Priority to EP19195886.7A priority patent/EP3606089A1/en
Priority to KR1020207032378A priority patent/KR102273627B1/ko
Priority to KR1020217020234A priority patent/KR102380830B1/ko
Priority to KR1020177013834A priority patent/KR102186338B1/ko
Priority to KR1020177013855A priority patent/KR102179023B1/ko
Priority to PL14877111T priority patent/PL3094103T3/pl
Publication of WO2015101181A1 publication Critical patent/WO2015101181A1/zh
Priority to US15/650,909 priority patent/US10149071B2/en
Priority to US16/180,020 priority patent/US10334372B2/en
Priority to US16/419,049 priority patent/US10616696B2/en
Priority to US16/813,915 priority patent/US10848878B2/en
Priority to US17/074,713 priority patent/US11297446B2/en
Priority to US17/075,655 priority patent/US11304011B2/en
Priority to US17/074,762 priority patent/US11197106B2/en
Priority to US17/169,616 priority patent/US11533571B2/en
Priority to US17/170,874 priority patent/US11363392B2/en
Priority to US17/169,751 priority patent/US11533572B2/en
Priority to US17/170,801 priority patent/US11483666B2/en
Priority to US17/170,954 priority patent/US11706574B2/en
Priority to US17/171,207 priority patent/US11582564B2/en
Priority to US17/170,925 priority patent/US11418895B2/en
Priority to US17/170,904 priority patent/US11375324B2/en
Priority to US17/172,007 priority patent/US11617045B2/en
Priority to US17/171,180 priority patent/US11582563B2/en
Priority to US17/171,987 priority patent/US11582565B2/en
Priority to US17/172,063 priority patent/US11558698B2/en
Priority to US17/172,040 priority patent/US11570556B2/en
Priority to US17/170,913 priority patent/US11368800B2/en
Priority to US17/170,931 priority patent/US11368801B2/en
Priority to US17/219,859 priority patent/US11589172B2/en
Priority to US17/218,326 priority patent/US11622209B2/en
Priority to US17/219,879 priority patent/US11627419B2/en
Priority to US17/219,871 priority patent/US11950055B2/en
Priority to US17/219,849 priority patent/US11974097B2/en
Priority to US17/219,839 priority patent/US11589171B2/en
Priority to US17/219,896 priority patent/US20210219074A1/en
Priority to US17/219,888 priority patent/US11805375B2/en
Priority to US17/219,882 priority patent/US11832060B2/en
Priority to US17/241,041 priority patent/US11463823B2/en
Priority to US17/455,927 priority patent/US11622211B2/en
Priority to US17/656,217 priority patent/US11546701B2/en
Priority to US17/656,220 priority patent/US11622212B2/en
Priority to US17/804,850 priority patent/US11632636B2/en
Priority to US17/804,611 priority patent/US11659341B2/en
Priority to US17/807,154 priority patent/US11632637B2/en
Priority to US17/823,951 priority patent/US11638105B2/en
Priority to US18/060,962 priority patent/US20230096660A1/en
Priority to US18/151,404 priority patent/US20230145673A1/en
Priority to US18/151,447 priority patent/US20230164497A1/en
Priority to US18/154,022 priority patent/US20230156412A1/en
Priority to US18/187,652 priority patent/US20230232166A1/en
Priority to US18/187,693 priority patent/US11917373B2/en
Priority to US18/188,491 priority patent/US20230232168A1/en
Priority to US18/305,368 priority patent/US20230262399A1/en
Priority to US18/308,760 priority patent/US20230269547A1/en
Priority to US18/349,118 priority patent/US20230353956A1/en
Priority to US18/349,116 priority patent/US20230353955A1/en
Priority to US18/349,115 priority patent/US20230353954A1/en
Priority to US18/356,200 priority patent/US20230362556A1/en
Priority to US18/357,098 priority patent/US20230362558A1/en
Priority to US18/357,092 priority patent/US20230362557A1/en
Priority to US18/361,807 priority patent/US20230370791A1/en
Priority to US18/361,844 priority patent/US20230379639A1/en
Priority to US18/366,104 priority patent/US20230379640A1/en
Priority to US18/446,452 priority patent/US20230388722A1/en
Priority to US18/447,280 priority patent/US20230388723A1/en
Priority to US18/468,676 priority patent/US20240007804A1/en
Priority to US18/472,180 priority patent/US20240015452A1/en
Priority to US18/472,442 priority patent/US20240015453A1/en
Priority to US18/472,580 priority patent/US20240015454A1/en
Priority to US18/473,206 priority patent/US20240015455A1/en
Priority to US18/488,960 priority patent/US20240048921A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2884—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/066—Loudspeakers using the principle of inertia
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/321—Physical
    • G10K2210/3216—Cancellation means disposed in the vicinity of the source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2876—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of damping material, e.g. as cladding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/13—Hearing devices using bone conduction transducers

Definitions

  • Embodiments of the present invention relate to a bone conduction device technology, and more particularly to a method for suppressing leakage of a bone conduction speaker and a bone conduction speaker capable of suppressing leakage.
  • a bone conduction speaker also called a vibration speaker, which stimulates the auditory nerves in the cochlea by generating mechanical vibrations having the same frequency and corresponding amplitude as the sound signal, thereby stimulating the auditory nerves in the cochlea, allowing the human to hear the sound
  • the bone conduction speaker is also Called bone conduction headphones.
  • the structure is as shown in FIGS. 1A and 1B, and generally includes an open-ended housing 110, a vibration panel 121, a transducer 122, and a connector 123.
  • the transducer device 122 is a component that effects electrical signal conversion to mechanical vibration.
  • the vibrating panel 121 is fixedly connected to the transducing device 122, and is synchronously vibrated by the transducing device 122.
  • the vibrating panel 121 protrudes from the opening of the outer casing 110 to fit the human skin, and the vibration is transmitted to the auditory nerve through the human tissue and the bone, so that the human hears the sound.
  • a connector 123 is disposed between the transducer 122 and the housing 110 for positioning the vibrating transducer 122 in the housing. In order to minimize the constraints on the vibration of the transducer 122, the connector 123 is typically made of a resilient material.
  • the mechanical vibration of the transducer device 122 not only drives the vibration of the vibration panel 121, but also conducts to the outer casing 110 through the connecting member 123, so that the outer casing 110 also vibrates. Therefore, the mechanical vibration generated by the bone conduction speaker can push the human tissue, and can also push the air in the portion where the vibration panel 121 and the outer casing 110 are not in contact with the human tissue, thereby generating air sound. This air sound is a leak. "leaked sound" It is harmless in some applications; however, in some applications, such as when people want to protect privacy when communicating with bone conduction speakers, or when they want to listen to music without disturbing others, they do not want to have a leak. presence.
  • a double-shell and dual-magnetic structure bone conduction speaker is disclosed in Korean Patent KR10-2009-0082999.
  • the speaker provided in this patent is as shown in FIG. 2, and includes: a first housing 210 that is open at the upper portion; and a second housing 220 that is spaced apart from the outside of the first housing 210 and surrounds the first housing 210.
  • the first housing 210 houses therein a movable coil 230 capable of inputting an electric signal, an inner magnetic member 240 and an outer magnetic member 250, and a double magnetic field is formed therebetween, and the movable coil 230 is placed in a magnetic field to attract Vibrating under the action of force and repulsive force; vibrating plate 260 connected to movable coil 230, capable of receiving vibration of movable coil 230; and vibration unit connected from outside of vibrating plate 260 to contact mechanical vibration on user's skin 270.
  • the solution provided by the patent encloses the second casing 220 outside the first casing 210 in order to block the vibration of the first casing 210 from being diffused outward by the second casing 220, thereby reducing the leakage sound to some extent.
  • this solution inevitably causes the second housing 220 to vibrate due to the fixed connection between the second housing 220 and the first housing 210, thereby making it difficult for the second housing 220 to achieve a better sealing effect.
  • the effect of actually reducing the leakage is poor.
  • the second housing 220 also increases the overall volume and weight of the speaker, which not only leads to an increase in cost, but also increases the complexity of the assembly process and reduces the consistency and reliability of the speaker.
  • Embodiments of the present invention provide a method for suppressing leakage of a bone conduction speaker and a bone conduction speaker capable of suppressing leakage to effectively reduce leakage of a bone conduction speaker.
  • an embodiment of the present invention provides a method for suppressing leakage of a bone conduction speaker, including:
  • a bone conduction speaker having a vibration panel, a transducer device and a housing that conforms to human skin and transmits vibration, wherein at least one sound hole is provided in at least a portion of the housing;
  • the transducer device drives the vibration panel to vibrate
  • the outer casing also vibrates with the transducer and pushes the outside air to form a sound leaking sound propagating in the air;
  • the acoustic waves in the casing formed by pushing the air inside the casing are led out from the sounding holes to the outside of the casing, and interfere with the sound leakage sound waves to suppress the leakage of the bone conduction speaker.
  • the sound introducing holes are provided at an upper portion, a middle portion, and/or a lower portion of a side wall of the outer casing, and/or a bottom portion of the outer casing.
  • a sound absorbing layer is provided in front of the sound introducing hole to adjust the phase and amplitude of the sound wave.
  • different sound holes are disposed to have the same phase to suppress sound waves of the same wavelength; or different sound holes are different between the sound holes. Phase to suppress sound waves of different wavelengths.
  • different portions of the same sound hole are disposed to have the same phase to suppress sound waves of the same wavelength; or, between different portions of the same sound hole, are provided to have Different phases to suppress sound waves of different wavelengths.
  • an embodiment of the present invention provides a bone conduction speaker including a housing, a vibration panel, and a transducer, wherein:
  • the transducer device is configured to generate vibration and is housed inside the outer casing;
  • the vibration panel is used to fit the skin and transmit vibration
  • At least one sound introducing hole is defined in at least a portion of the outer casing, and preferably, the sound guiding hole is The sound waves in the casing formed by vibrating the air inside the casing are taken out to the outside of the casing, and interfere with the sound leakage sound generated by the casing vibration to push the air outside the casing to reduce the amplitude of the sound leakage sound.
  • the outer casing has a side wall and a bottom wall, and the sound introducing hole is opened in a side wall and/or a bottom wall of the outer casing.
  • the sound hole is opened at an upper portion and/or a lower portion of the side wall of the outer casing.
  • the side wall of the outer casing is cylindrical, and the number of sound introducing holes formed in the side wall of the outer casing is at least two, and the circumferential circumferential direction is uniform or non-uniform.
  • the outer casing can also have other shapes.
  • the number of the sound introducing holes opened in the bottom wall of the outer casing is at least two, and the center of the bottom wall is centered and uniformly distributed in a ring shape; and/or the outer casing
  • the sound hole of the bottom wall is a hole located at the center of the bottom wall.
  • the sound hole is a through hole; or a damping layer is provided at an opening of the sound hole.
  • the difference between the different sound holes or between different portions of the same sound hole is set to have different or the same phase difference.
  • the damping layer is a tuning paper, a tuning cotton, a nonwoven fabric, a silk, a cotton cloth, a sponge or a rubber.
  • the shape of the sound hole is circular, elliptical, Rectangular or elongated; a plurality of the sound holes are arranged to have the same shape or different shapes.
  • the transducer device includes a magnetic component and a voice coil, or the transducer device includes a piezoelectric ceramic.
  • the technical solution provided by the embodiment of the present invention utilizes the principle of acoustic wave interference, and the sound sound wave in the bone conduction speaker casing is taken out of the shell by opening the sound introducing hole in the outer casing, and interferes with the sound leakage sound generated by the vibration of the outer casing to reduce the amplitude.
  • the solution not only suppresses the effect of leakage, but also achieves simplicity, does not increase the volume and weight of the bone conduction speaker, and hardly increases the product cost.
  • FIG. 1A and 1B are schematic structural views of a bone conduction speaker in the prior art
  • FIG. 2 is a schematic structural view of another bone conduction speaker in the prior art
  • FIG. 3 is a schematic diagram of an acoustic interference principle applied to an embodiment of the present invention.
  • FIGS. 4A and 4B are schematic structural views of a bone conduction speaker according to Embodiment 1 of the present invention.
  • 4C is a physical model of a bone conduction speaker according to Embodiment 1 of the present invention.
  • 4D is a diagram showing the effect of suppressing sound leakage of a bone conduction speaker according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of an equal-tone curve applied to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for suppressing leakage of a bone conduction speaker according to Embodiment 2 of the present invention.
  • FIG. 7A and 7B are schematic diagrams showing the structure of a bone conduction speaker according to a third embodiment of the present invention
  • FIG. 7C is a diagram showing the effect of suppressing leakage of a bone conduction speaker according to Embodiment 3 of the present invention
  • FIG. 8A and 8B are schematic diagrams showing the structure of a bone conduction speaker according to a fourth embodiment of the present invention
  • FIG. 8C is a diagram showing the effect of suppressing leakage of a bone conduction speaker according to Embodiment 4 of the present invention
  • FIGS. 9A and 9B are schematic diagrams showing the structure of a bone conduction speaker according to a fifth embodiment of the present invention
  • FIG. 9C is a diagram showing the effect of suppressing leakage of a bone conduction speaker according to Embodiment 5 of the present invention
  • FIGS. 10A and 10B are schematic diagrams showing the structure of a bone conduction speaker according to Embodiment 6 of the present invention
  • FIG. 10C is a diagram showing the effect of suppressing leakage of a bone conduction speaker according to Embodiment 6 of the present invention
  • FIG. 11A and 11B are schematic diagrams showing the structure of a bone conduction speaker according to Embodiment 7 of the present invention
  • FIG. 11C is a diagram showing the effect of suppressing sound leakage of the bone conduction speaker according to Embodiment 7 of the present invention
  • FIGS. 12A and 12B are schematic structural views of a bone conduction speaker according to Embodiment 8 of the present invention.
  • FIGS. 13A and 13B are schematic diagrams showing the structure of a bone conduction speaker according to Embodiment 9 of the present invention.
  • 210 a first housing
  • 220 a second housing
  • 230 a movable coil
  • 240 an inner magnetic member
  • 250 an outer magnetic member
  • 260 a vibrating plate
  • 270 a vibration unit
  • FIG. 3 is a schematic diagram of an acoustic interference principle applied to an embodiment of the present invention.
  • Two important parameters of sound waves The number is frequency and amplitude, and two sound waves of the same frequency interfere in space, that is, the amplitudes of the two sound waves are superimposed on each other.
  • the frequencies of the two sound sources are the same.
  • the sound waves from two sound sources may meet at a certain point A in space.
  • the in-phase amplitudes are added to each other at point A, so that the acoustic signal at point A increases. Conversely, if the phase is opposite at point A, the inverse amplitudes are subtracted from each other, so that the acoustic signal at point A decreases.
  • the present invention applies the above-described principle of acoustic wave interference to a bone conduction speaker, and proposes a bone conduction speaker capable of reducing leakage.
  • the bone conduction speaker includes a housing 10, a vibration panel 21, and a transducer device 22.
  • the transducer device 22 is configured to generate vibration and is housed inside the outer casing 10; at least a portion of the outer casing 10 is provided with at least one sound introducing hole 30 for the outer casing
  • the acoustic wave in the casing formed by the internal air vibration is taken out to the outside of the casing 10, and interferes with the sound leakage sound generated by the casing 10 vibrating to push the air outside the casing to reduce the amplitude of the sound leakage sound.
  • the technical solution of the embodiment can be applied to various bone conduction speakers having a typical structure.
  • the transducer device 22 of the bone conduction speaker is a component that can convert an electrical signal to mechanical vibration based on a certain principle. Commonly, if an audio electric signal is input into the voice coil, the voice coil is placed in a magnetic field, and the voice coil can be driven by electromagnetic action. Alternatively, the transducer device 22 can be fabricated using the piezoelectric ceramic principle to convert the electrical signal into a shape change of the ceramic component to generate vibration.
  • the vibrating panel 21 is fixedly coupled to the transducing device 22, and is synchronously vibrated by the transducing device 22.
  • the vibrating panel 21 protrudes from the opening of the outer casing 10 to the outer casing 10 to fit the human skin. Vibration is transmitted to the auditory nerve through human tissue and bones, allowing people to hear sound.
  • a connecting member 23 can be connected to position the vibrating transducer 22 in the housing 10.
  • the connector 23 can be one or more separate components or can be integrally formed with the transducer 22 or the housing 10.
  • the connecting member 23 is usually made of an elastic material.
  • the transducer device 22 drives the vibration panel 21 to vibrate.
  • the transducer device 22 itself is also a vibration source that is housed inside the outer casing 10.
  • the surface of the transducer device 22 vibrates to cause the air in the casing to vibrate, and the generated sound waves are inside the outer casing 10, which may be referred to as sound waves in the casing.
  • the vibration panel 21 and the transducer device 22 are positioned on the outer casing 10 through the connecting member 23, and vibration is inevitably applied to the outer casing 10 to drive the outer casing 10 to vibrate synchronously. Therefore, the outer casing 10 pushes the air vibration outside the casing to form a sound leaking sound wave. .
  • the leaking sound waves propagate outward, forming a leak.
  • the acoustic and leaking sound waves in the shell correspond to the two sound sources shown in FIG.
  • a sound introducing hole 30 is formed in the wall surface of the outer casing, and the sound wave in the shell can be guided and propagated to the outside of the shell, and propagates in the air together with the sound leaking sound wave, and interference occurs, thereby reducing the sound sound wave.
  • the amplitude, that is, the leakage is reduced. Therefore, the technical solution of the embodiment solves the problem of leakage sound to some extent by opening a sound hole on the outer casing, and does not increase the volume and weight of the bone conduction speaker.
  • the sound introducing hole 30 is exemplarily disposed at the upper portion of the side wall height, that is, a portion from the top (vibration panel) to the height of the side wall height direction by 1/3.
  • FIG. 4C is a physical model of a bone conduction speaker according to an embodiment of the present invention.
  • the simplified structure of the bone conduction speaker is as shown in the foregoing embodiment, and the structure thereof can be further abstracted into a mechanical component, as shown in the figure, on the side wall of the outer casing 10 and
  • the connecting member 23 between the vibrating panels 21 can be abstracted as a parallel elastic element and resistance
  • the connection between the vibrating panel 21 and the transducer device 22 can be abstracted as the connection relationship of the elastic members 24.
  • the S opening is an opening area of the sound introducing hole
  • the S outer casing is an outer surface of the outer surface not in contact with the human face
  • P a , P b , P c , and P e are the sound pressures generated by the a-plane, the b-plane, the c-plane, and the e-plane at any point in the inner space of the shell, respectively.
  • ⁇ the angular frequency of vibration (the same below),
  • P a resistance , P b resistance , P c resistance , and P e resistance are the acoustic impedance of the air itself, respectively:
  • r is the acoustic damping per unit length
  • r' is the acoustic mass per unit length
  • z a is the distance from the observation point to the a-plane sound source
  • z b is the distance from the observation point to the b-plane sound source
  • z c is The distance from the observation point to the c-plane sound source
  • z e is the distance from the observation point to the e-surface sound source.
  • W a (x, y), W b (x, y), W c (x, y), W e (x, y), W d (x, y) are a, b, c, e, d, respectively
  • the sound source intensity per unit area can be derived from the following formula group (11):
  • F is the driving force converted by the transducer
  • F a , F b , F c , F d , and F e are driving forces other than a, b, c, d, and e, respectively.
  • S d is the outer shell (d surface) area
  • L is the equivalent load of the face when the vibrating plate acts on the face.
  • ⁇ is the energy dissipated on the elastic element 2
  • k 1 and k 2 are the elastic coefficients of the elastic member 1 and the elastic member 2, respectively.
  • the sound pressure generated by the vibration of the casing is:
  • P a, P b, P c , P e is a function of the position of all, when we took a position in the housing opening, when the opening area S of the opening, the sound pressures at the openings of the total effect Pds.
  • Pd ds is an amount that we can't adjust, then adjust Pds, make it P d ds offset.
  • the Pds contains complete phase and amplitude information, its phase, amplitude and shell size of the bone conduction speaker, the vibration frequency of the transducer, the opening position, shape, number and size of the sound hole and whether there is damping on the hole. Close relationship, which allows us to suppress the sound leakage by adjusting the position, shape and number of the sound hole and/or increasing the damping and/or adjusting the damping material.
  • the above formula derived by the inventors is only applicable to the bone conduction speaker.
  • the air in the air chamber of the conventional air conduction earphone can be regarded as a whole, and its phase is insensitive to the position, which is fundamentally different from the bone conduction speaker, and therefore the air conduction speaker cannot be applied to the above formula.
  • FIG. 5 is a schematic diagram of an equal-tone curve applied to an embodiment of the present invention.
  • the abscissa is frequency and the ordinate is sound pressure level.
  • the sound pressure is the change caused by the atmospheric pressure being disturbed, that is, the residual pressure of atmospheric pressure, which is equivalent to the pressure change caused by superimposing a disturbance on the atmospheric pressure, so the sound pressure can reflect the amplitude of the sound wave.
  • the sound pressure levels corresponding to different frequencies on each curve in Fig. 5 are different, but the strong and weak responses felt by the human ear are the same, and each curve is marked with a number indicating the loudness of the curve.
  • the human ear is not sensitive to high and low frequency sounds, and when the volume is large, it is more sensitive to high and low frequency sounds.
  • the speaker is more focused on the range of the mid-bass band, such as 1000 Hz to 4000 Hz, more preferably, 1000 Hz to 4000 Hz, or 1000 Hz to 3500 Hz, more preferably, 1000 Hz to 3000 Hz, or 1500 Hz to 3000 Hz. Leakage in this frequency range is the primary object to be eliminated.
  • Figure 4D shows the effect of suppressing the leakage sound (the numerical calculation is close to the measured result in the above band). It is selected, for example, as a cylindrical outer casing 30, which may have a side wall and a bottom wall. 4A and 4B, which is only a preferred example, the outer casing 10 has a cylindrical shape with a radius of 22 mm and a side wall height of 14 mm. The sound introducing hole 30 is opened at the upper side of the side wall of the outer casing 10, and has a shape. It is rectangular and has a plurality of numbers and is evenly distributed on the side wall of the outer casing 10.
  • the target area of the bottom wall of the outer casing 10 is set to be 50 cm away from the target area where the sound leakage is to be eliminated, and the distance from the sound wave transmitted to the target area is transmitted to the surface of the acoustic wave self-transducing device 22 through the sound introducing hole 30 to the target area. The distance between them is close to 180 degrees. With this arrangement, the sound leakage sound generated by the bottom wall of the outer casing 10 can be significantly reduced or even eliminated in the area to be eliminated.
  • the leakage is reduced by an average of about 10 dB after the sound hole is opened.
  • the suppressed leakage sound is substantially over 10 dB.
  • the leakage sound is reduced by more than 20 dB than the scheme in which the sound introducing hole is not opened.
  • the sound introducing hole 30 may be opened to the side wall 11 and/or the bottom wall 12 of the outer casing according to different requirements for the installation position.
  • the sound introducing holes 30 are opened at an upper portion and/or a lower portion of the side wall 11 of the casing.
  • the number of sound introducing holes formed in the side wall 11 of the outer casing may be at least two, preferably uniformly distributed in an annular circumferential direction.
  • the number of sound introducing holes formed in the bottom wall 12 of the outer casing may be at least two, and the center of the bottom wall is centered and uniformly distributed in a ring shape.
  • the sounding holes distributed in a ring shape may be provided at least one turn.
  • the number of sound holes provided in the bottom wall 12 of the casing may be only one, and the sound hole is provided at the center of the bottom wall 12.
  • the sounding holes may be one or more, preferably a plurality, and evenly arranged.
  • the number of sound-inducing holes per turn can be, for example, 6-8.
  • the shape of the sound hole may be circular, elliptical, rectangular or elongated. Long strips generally refer to strips along a line, curve, or arc. Sound holes of various shapes may be the same or different on a bone conduction speaker.
  • the side walls of the outer casing may not be cylindrical, and the plurality of sound introducing holes may be non-uniformly distributed, but may be disposed as needed.
  • the shape, number and placement of the sounding holes can be combined in a variety of ways, and some other preferred embodiments are provided below in conjunction with the drawings.
  • FIG. 6 is a schematic diagram of a method for suppressing leakage of a bone conduction speaker according to a second embodiment of the present invention.
  • the method is applicable to the sound leakage suppression in the bone conduction speaker provided by the embodiments of the present invention, and the method includes:
  • Step 1 Providing a bone conduction speaker having a vibration panel 21 that conforms to human skin and transmits vibration, a transducer device 22, and a housing 10, wherein at least one sounding is provided in at least a portion of the housing 10. Hole 30;
  • Step 2 the transducer device 22 drives the vibration panel 21 to vibrate
  • Step 3 The outer casing 10 also vibrates with the transducer 22 and pushes the outside air to form a sound leaking sound propagating in the air;
  • Step 4 The sound waves in the casing formed by pushing the air in the casing are led out from the sound introducing hole 30 to the outside of the casing 10, and interfere with the sound leakage sound waves to suppress the sound leakage of the bone conduction speaker.
  • the formula and method in the first embodiment are preferably used to determine the effect of the sound leakage, thereby designing the position of the sound hole.
  • a damping layer is provided in front of the sound introducing hole 30 to adjust the phase and amplitude of the sound wave.
  • different sound holes are disposed to have the same phase to suppress sound waves of the same wavelength; or different sound holes are arranged to have different phases, Suppresses sound waves of different wavelengths.
  • different portions of the same sound hole are disposed to have the same phase to suppress sound waves of the same wavelength; or, different portions of the same sound hole are disposed to have different Phase to suppress sound waves of different wavelengths.
  • the acoustic waves in the casing may be processed to be substantially equal in magnitude to the sound of the sound leakage, and the phases are substantially opposite, so that the leakage sound is further reduced.
  • FIG. 7A and 7B are schematic structural views of a bone conduction speaker according to a third embodiment of the present invention, and the present embodiment
  • the bone conduction speaker provided by the example includes an opening-like housing 10, a vibration panel 21, and a transducer device 22.
  • the outer casing 10 has a cylindrical shape, and a sound introducing hole 30 is formed through a lower portion of the side wall of the outer casing 10 (a portion having a height from the height of the side wall of 2/3 to the bottom).
  • the number of the sound introducing holes 30 is, for example, eight, and the shape is, for example, a rectangular shape, and the sound introducing holes 30 are uniformly distributed in a ring shape on the side wall of the outer casing 10.
  • the transducer is preferably implemented based on the principle of electromagnetic conversion, including components such as a magnetizer and a voice coil, which can be housed inside the housing to produce synchronous vibration of the same frequency.
  • Figure 7C shows the effect of suppressing the leakage.
  • the simple analysis shows that the leakage reduction value is higher than 5dB in the spectrum range of 1400Hz ⁇ 4000Hz. In the frequency range of 2250Hz ⁇ 2500Hz, the leakage suppression effect is the most significant, and the value is reduced. Above 20dB.
  • the bone conduction speaker provided in the embodiment includes an open casing 10, a vibration panel 21 and a transducer device 22.
  • the outer casing 10 has a cylindrical shape, and a sound introducing hole 30 is formed in a middle portion of the side wall of the outer casing 10 (a portion having a height of 1/3 of the side wall height to a height of 2/3).
  • the number of the sound introducing holes 30 is eight, and the shape is a rectangle, and the sound introducing holes 30 are uniformly distributed in a ring shape on the side wall of the outer casing 10.
  • the transducer is preferably implemented based on the principle of electromagnetic conversion, including components such as a magnetizer and a voice coil, which can be housed inside the housing to produce synchronous vibration of the same frequency.
  • Figure 8C shows the effect of eliminating leakage.
  • the simple analysis is summarized.
  • the suppression effect of the leakage is obvious.
  • the leakage reduction value exceeds 10dB, at 2200Hz ⁇ 2500Hz.
  • the leakage suppression effect is most significant, and the reduction value is higher than 20 dB.
  • the scheme has a balanced effect of reducing leakage in each frequency band, but reduces the leakage effect.
  • the best frequency band is consistent with the scheme of the third embodiment.
  • FIGS. 9A and 9B are schematic diagrams showing the structure of a bone conduction speaker according to Embodiment 5 of the present invention.
  • the bone conduction speaker provided in this embodiment includes an opening shell 10, a vibration panel 21, and a transducer device 22.
  • the outer casing 10 has a cylindrical shape, and a sound introducing hole 30 is formed in the circumferential direction of the bottom wall of the outer casing 10.
  • the number of the sound introducing holes 30 is, for example, eight, and the shape is, for example, a rectangular shape, and the sound introducing holes 30 are uniformly distributed in a ring shape on the bottom wall of the outer casing 10.
  • the transducer is preferably implemented based on the principle of electromagnetic conversion, including components such as a magnetizer and a voice coil, which can be housed inside the housing to produce synchronous vibration of the same frequency.
  • Figure 9C shows the effect of suppressing the leakage.
  • the simple analysis is summarized. In the range of 1000 Hz to 3000 Hz, the suppression effect of the leakage is obvious. In the range of 1700 Hz to 2700 Hz, the leakage reduction value exceeds 10 dB, at 2200 Hz to 2400 Hz. In the frequency band, the leakage suppression effect is most significant, and the reduction value is higher than 20 dB.
  • the effect of reducing the sound leakage in each frequency band is relatively balanced, but the frequency band with the best effect of reducing the sound leakage is consistent with the third embodiment.
  • the effect of reducing the sound leakage is similar to that of the fourth embodiment, which is superior to the third embodiment, but at 2200 Hz to 4000 Hz, the leakage reduction effect of this embodiment is significantly inferior to the fourth embodiment and the embodiment. three.
  • FIGS. 10A and 10B are schematic diagrams showing the structure of a bone conduction speaker according to Embodiment 6 of the present invention.
  • the bone conduction speaker provided by the embodiment includes an open shell 10, a vibrating panel 21, and a transducer 22.
  • the sound introducing holes 30 are formed in the upper portion and the lower portion of the side wall of the outer casing 10, respectively.
  • the sound introducing holes 30 are uniformly distributed in an annular shape at the upper and lower portions of the side wall of the outer casing 10, and the number of the sound introducing holes 30 per ring is eight.
  • the sound introducing holes 30 provided at the upper and lower portions are symmetrically disposed with respect to the middle section of the outer casing 10.
  • Each of the sound introducing holes 30 has a circular shape.
  • the shape of the sound-inducing holes in the upper and lower portions of the side wall may be different, and the inner damping layer may be set to suppress sound waves of the same wavelength (frequency), or may be suppressed by sound waves of different wavelengths.
  • FIG. 10C is a diagram showing the effect of suppressing the leakage of the embodiment.
  • the simple analysis summarizes that in the spectrum range of 1000 Hz to 4000 Hz, the suppression effect of the leakage is obvious in this embodiment; in the range of 1600 Hz to 2700 Hz, the leakage reduction value exceeds 15dB, in the frequency band of 2000Hz ⁇ 2500Hz, the leakage suppression effect is the most significant, the reduction value is higher than 20dB.
  • the effect of reducing the sound leakage in each frequency band is relatively balanced, and the effect is superior to the single height opening method of the third, fourth and fifth embodiments.
  • FIGS. 11A and 11B are schematic diagrams showing the structure of a bone conduction speaker according to Embodiment 7 of the present invention.
  • the bone conduction speaker provided in this embodiment includes an opening shell 10, a vibration panel 21, and a transducer device 22.
  • the sound introducing holes 30 are formed in the upper and lower portions of the side wall of the outer casing 10 and the bottom wall of the outer casing 10, respectively.
  • the sound introducing holes 30 formed in the side walls are uniformly distributed in an annular shape at the upper and lower portions of the side wall of the outer casing 10, and the number of each ring is eight, and the sound introducing holes 30 provided at the upper and lower portions are symmetrically disposed with respect to the middle section of the outer casing 10.
  • Each of the sound introducing holes 30 opened in the side wall has a rectangular shape.
  • the shape of the sound introducing hole 30 formed in the bottom wall is an elongated strip shape along an arc, and the number is four, and the center of the bottom wall is uniformly distributed in a ring shape.
  • the sound introducing hole 30 opened in the bottom wall further includes a circular through hole opened at the center.
  • FIG. 11C is a diagram showing the effect of suppressing the leakage of the embodiment.
  • the simple analysis and summarization show that the scheme has a significant effect on suppressing the leakage in the frequency range of 1000 Hz to 4000 Hz; in the range of 1300 Hz to 3000 Hz, the value of the leakage reduction exceeds 10dB, in the frequency band of 2000Hz ⁇ 2700Hz, the leakage suppression effect is the most significant, and the reduction value is higher than 20dB.
  • the scheme has relatively balanced effects of reducing leakage in each frequency band, and the effect is superior to the single height opening schemes of the third, fourth and fifth embodiments.
  • the effect of the embodiment is superior to the sixth embodiment in suppressing the sound leakage in the frequency bands of 1000 Hz to 1700 Hz and 2500 Hz to 4000 Hz.
  • FIGS. 12A and 12 are schematic structural views of a bone conduction speaker according to Embodiment 8 of the present invention.
  • the bone conduction speaker provided in this embodiment includes an opening-like housing 10, a vibration panel 21, and a transducer device 22.
  • a sound-inducing hole 30 is formed in the upper portion of the side wall of the outer casing 10, and is uniformly distributed in the upper portion of the side wall of the outer casing 10 in an annular shape, for example, eight. Different from the third embodiment, the sound introduction in this embodiment is The shape of the hole 30 is circular.
  • the eighth embodiment is substantially the same as the first embodiment, and can effectively suppress the leakage sound.
  • FIGS. 13A and 13B are schematic diagrams showing the structure of a bone conduction speaker according to Embodiment 9 of the present invention.
  • the bone conduction speaker provided in this embodiment includes an opening-like housing 10, a vibration panel 21, and a transducer device 22.
  • the sound introducing holes 30 are uniformly distributed in the upper portion, the middle portion, and the lower portion of the side wall 11, and the bottom wall 12 of the outer casing 10 is also circumferentially opened. Circle the sound hole 30.
  • the aperture size and the number of holes of each sound introducing hole 30 are the same.
  • the effect of reducing the sound leakage in each frequency band is relatively balanced, and the effect is better than the single height opening method of the third, fourth and fifth embodiments.
  • the sound introducing hole 30 may be an unobstructed through hole.
  • a damping layer (not shown in the drawings of the specification) may be provided at the opening of the sound introducing hole 30 to adjust the phase and amplitude of the sound wave, thereby Correct the effect of the sound waves in the guide shell.
  • the material selection and setting position of the damping layer can be variously.
  • the damping layer is a material that has a certain damping on the sound quality conduction, such as tuning paper, tuning cotton, non-woven fabric, silk, cotton cloth, sponge or rubber.
  • a damping layer is attached to the inner wall of the sound introducing hole 30, or a damping layer or the like is disposed outside the opening of the sound introducing hole 30.
  • the damping layer is disposed to have the same phase difference between different sounding holes to suppress the leakage of the same wavelength, or set to be different for the sounding, corresponding to different sounding holes.
  • the holes (30) have different phase differences between them to suppress leakage of different wavelengths (i.e., leakage of a specific band).
  • different portions of the same sound introducing hole (30) are disposed to have the same phase (for example, using a pre-designed stepped or stepped damping layer) to suppress sound waves of the same wavelength; or Between different parts of the same sound hole (30), it is set to have different phases to suppress sound waves of different wavelengths.
  • the bone conduction speaker housing was closed, so the sound source inside the housing was enclosed in the housing.
  • the technical solution of the embodiment of the present invention is to open a hole at a proper position of the outer casing, so that the two sounds generated by the sound wave and the sound sound wave in the shell are as close as possible in the space, and the phase is as close as possible to the opposite, thereby generating a good interference effect. It can significantly reduce the external leakage of the bone conduction speaker, and does not increase the volume and weight, does not affect the reliability of the product, and almost does not increase the cost.
  • the solution is simple and reliable, and has high efficiency in reducing leakage.
PCT/CN2014/094065 2014-01-06 2014-12-17 一种抑制骨传导扬声器漏音的方法及骨传导扬声器 WO2015101181A1 (zh)

Priority Applications (79)

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KR1020167017110A KR101900661B1 (ko) 2014-01-06 2014-12-17 골전도 스피커의 누음을 억제하는 방법 및 골전도 스피커
BR112016015742-7A BR112016015742B1 (pt) 2014-01-06 2014-12-17 Método de redução de vazamento sonoro em alto-falante de condução óssea e um alto- falante de condução óssea
DK14877111T DK3094103T3 (da) 2014-01-06 2014-12-17 Fremgangsmåde til at undertrykke lydlækage af knogleledningshøjtaler og knogleledningshøjtaler
JP2016545828A JP6282749B2 (ja) 2014-01-06 2014-12-17 骨伝導スピーカーの音漏れ抑制方法及び骨伝導スピーカー
US15/109,831 US9729978B2 (en) 2014-01-06 2014-12-17 Systems and methods for suppressing sound leakage
EP14877111.6A EP3094103B1 (en) 2014-01-06 2014-12-17 Method for suppressing sound leakage of bone conduction loudspeaker and bone conduction loudspeaker
KR1020227010046A KR102528291B1 (ko) 2014-01-06 2014-12-17 골전도 스피커의 누음을 억제하는 방법 및 골전도 스피커
ES14877111T ES2753428T3 (es) 2014-01-06 2014-12-17 Método para suprimir la pérdida de sonido de un altavoz de conducción ósea y altavoz de conducción ósea
EP19195886.7A EP3606089A1 (en) 2014-01-06 2014-12-17 Methods and systems for reducing sound leakage by a bone conduction speaker
KR1020207032378A KR102273627B1 (ko) 2014-01-06 2014-12-17 골전도 스피커의 누음을 억제하는 방법 및 골전도 스피커
KR1020217020234A KR102380830B1 (ko) 2014-01-06 2014-12-17 골전도 스피커의 누음을 억제하는 방법 및 골전도 스피커
KR1020177013834A KR102186338B1 (ko) 2014-01-06 2014-12-17 골전도 스피커의 누음을 억제하는 방법 및 골전도 스피커
KR1020177013855A KR102179023B1 (ko) 2014-01-06 2014-12-17 골전도 스피커의 누음을 억제하는 방법 및 골전도 스피커
PL14877111T PL3094103T3 (pl) 2014-01-06 2014-12-17 Sposób tłumienia wycieku dźwięku z głośnika z przewodnictwem kostnym i głośnik z przewodnictwem kostnym
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US20160329041A1 (en) 2016-11-10
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